Ni掺杂含钛高炉渣制备光催化剂及其性能研究

Study on Preparation of Photocatalysts by Doping Ni into Ti-bearing Blast Furnace Slag and their Performance

含钛高炉渣含TiO_(2),可用来制备光催化剂以实现非提钛法综合利用含钛高炉渣。以攀钢含钛高炉渣为原料,采用液相法及煅烧法制备Ni掺杂光催化剂,并通过SEM、XRD对催化剂进行了表征;在紫外光照射下,考察了催化剂煅烧温度、Ni掺杂量及煅烧时间对模拟污染物亚甲基蓝溶液降解率的影响。结果表明:在煅烧温度500℃、掺杂量为(Ni-Ti质量比)2%、煅烧时间2 h的优化条件下,制备的Ni掺杂光催化剂对亚甲基蓝的降解率达到80.0%,比未掺杂高炉渣提高了26.0%。

Ti-bearing blast furnace slag contains TiO_(2) and can be used to prepare photocatalysts to realize comprehensive utilization of Ti-bearing blast furnace slag without titanium extraction.Ni-doped photocatalysts were prepared with Ti-bearing blast furnace slag as raw material via a liquid-phase method followed by calcination.The catalysts were characterized by SEM and XRD.The influences of calcination temperature, Ni doping amount and calcination time of the catalysts on the degradation rate of methylene blue solution(the simulated pollutant) were investigated by ultraviolet light irradiation.Under the optimized conditions of calcination temperature of 500 ℃,Ni doping amount of 2% Ti mass, and calcination time of 2 h, the degradation rate of methylene blue caused by the prepared Ni-doped photocatalyst reaches 80.0%,which is 26.0% higher than that caused by the undoped blast furnace slag.